JP2556888Y2 - Filter device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filter device for filtering a fluid such as air, and more particularly, to a filter device having a pleated filter medium bent in an accordion shape.

[0002]

2. Description of the Related Art In a filter device for purifying a fluid such as air, it is widely used to use a filter medium obtained by pleating paper, nonwoven fabric, or the like into a wave shape.
In order to increase the filtration area by increasing the filtration area within a certain space volume, it is often practiced to use a pleated filter medium which is further bent in an accordion shape and accommodated in a filter device.

[0003]

[Problem to be Solved by the Invention] However, in the case of using a pleated filter medium which is further bent in an accordion shape, the filter medium may be deformed during use, or the pleated folds may be closely contacted. There has been a problem that the filtering effect of the filter medium tends to decrease during use. In other words, when the pleated filter media is further bent into an accordion shape, the air that has entered from the dirty side of the filter media pushes the folds of the filter media in a direction almost perpendicular to the folds of the filter media. Since it is easy to enter the folds of the filter medium after colliding, the filter medium is deformed to the clean side or the pressure that causes the folds and folds to come into contact with each other. It is easier to receive
Such a tendency was particularly remarkable in the filter medium portions exposed on both left and right sides of the filter device. For this reason, in a filter device using a filter medium having the above-described shape, it is a major problem to prevent the deformation of the filter medium and the contact phenomenon between the folds and the folds. An object of the present invention is to provide a filter device that uses a filter material obtained by further folding a pleated product into an accordion shape, and that can prevent the deformation of the filter material and the contact phenomenon between the folds and the folds. is there.

[0004]

In the filter device of the present invention, as a means for preventing the deformation of the filter medium and the contact phenomenon between the folds and the folds, a filter is provided on the clean side of the filter medium.
A filter medium retainer for supporting the filter medium is attached. The filter medium retainer includes a triangular support portion inserted into the clean side recess of the accordion-type filter medium, and a side support portion abutting on the left and right side exposed portions of the filter medium. And a plurality of comb-shaped projections to be inserted between the folds and the folds of the filter medium are provided on at least the side of the side support section where the filter medium abuts. The filter medium retainer may be integrally formed and manufactured, or may be manufactured by assembling a plurality of molded and manufactured parts.

[0005] That is, the filter device according to the present invention comprises a filter frame having left and right open side surfaces, and a filter material which is disposed in the filter frame and which is pleated in a wave shape and further bent in an accordion shape. A frame-shaped filter medium retainer arranged along the fluid-exposed-side exposed surface of the filter medium and in contact with the filter medium, wherein the filter medium retainer is inserted into an accordion-shaped bent concave portion of the filter medium. And a lateral support portion that abuts the filter medium on both left and right side surfaces of the filter frame. Of the above-mentioned respective support portions, at least the filter material abutment surface of the side support portion has folds and folds of the filter material. And has a plurality of comb-shaped projections inserted between them.

[0006]

When the filter device of the present invention is used, fluid such as air to be filtered is supplied from the rear of the filter device.
After entering the rear accordion-shaped recess of the filter medium, it is guided by the folds of the filter medium, enters between the folds and the folds, passes through the filter medium, and exits into the front accordion-shaped recess of the filter medium, and then the filter device has Discharged forward. At this time, the accordion-shaped filter medium is swelled and deformed in the direction of the left and right side surfaces of the filter medium and in the direction of the front-side accordion-shaped concave portion due to the entering air, and each of the folds is pushed forward of the device and tends to come into close contact with each other. Although it will be subjected to pressure, the triangular support frame and the side support frame of the filter medium retainer reliably prevent the swelling deformation of the filter medium in the left and right side direction and the front side concave direction, and the filter medium of each frame. The comb-like projections provided on the contact surface side and inserted between the folds and folds of the filter medium function to reliably prevent the folds and folds of the filter medium from coming into close contact.

[0007]

FIG. 1 is a perspective view of a filter device according to an embodiment of the present invention. A filter device A includes a filter frame 1, a filter medium 2, and a filter medium retainer 3. The filter frame 1 has a rear frame portion 4, a top plate portion 5, a bottom plate portion 6, and a front frame portion 7, and the top plate portion 5 and the bottom plate portion 6 have four front protruding portions 5a or 6a, respectively. Is formed. The rear frame portion 4 connects the top plate portion 5 and the bottom plate portion 6, and the front frame portion 7 has four front projecting portions 5a of the top plate portion 5.
And the four front protruding portions 6 a of the bottom plate portion 6. The left and right sides of the filter frame 1 are open. Each part of the filter frame 1 is made of a synthetic resin, and may be manufactured by integrally molding them.
Each part may be appropriately divided and formed, and then assembled by bonding or the like.

The filter medium 2 is obtained by pleating paper or non-woven fabric into a corrugated shape, and further folding it into an accordion shape as shown in FIG. 2 and arranging it in the filter frame 1. As shown by the arrow, it enters from the rear side of the filter device, passes through the filter medium, and exits forward. The filter medium retainer 3 is attached to the front exposed surface of the filter medium 2 (that is, the clean side). The filter medium retainer 3 is shown in FIGS.
(B) It is a frame of the shape shown in (exploded view). In this embodiment, the filter medium retainer 3 includes two side frame members 8 and 9.
And one intermediate frame member 10 is assembled, but may be integrally formed as a whole. The filter medium retainer 3 includes three triangular support portions 11 that are inserted into the front recessed portions of the accordion-shaped filter medium 2 and contact and hold the ridges of the folds of the filter medium 2, and folds on both left and right exposed surfaces of the filter medium 2. And a rod-shaped support portion 12 that contacts and holds the ridge line of the support member.

A plurality of comb-shaped projections 13 are provided on the filter material contact surfaces of the triangular support portion 11 and the rod-shaped support portion 12, respectively. Inserted. In some cases, the comb-shaped protrusion 13 may be provided only on the rod-shaped support portion 12. In the present embodiment, each of the frame members 8, 9, and 10 is made of a separately molded synthetic resin, and the connection protrusions 14a to 14
linked by f. Further, in the present embodiment, the filter medium retainer 3 is composed of three frame members. However, it is needless to say that the number of frame members can be increased or decreased according to the number of valleys of the accordion filter medium.

When using a filter device in which a filter medium 2 is disposed in a filter frame 1 and a filter medium retainer 3 is mounted on the front side, the air to be filtered is filtered from the rear (dirty side) of the filter apparatus A. It enters the apparatus, passes through the filter medium 2 and exits forward (clean side). At this time, the filter medium 2 swells and deforms in the direction of the left and right sides of the accordion and in the direction of the front recess due to the incoming air, and receives pressure in the direction in which the pleats come into close contact with each other. The bulging deformation is prevented by the portion 11 and the rod-shaped support portion 12, and the folds of the filter medium 2 are formed by the comb-shaped projections 13 provided on each support portion and inserted between the folds and folds of the filter medium. It is possible to prevent the pleats from being in close contact with each other.

[0011]

According to the filter device of the present invention, a filter medium retainer is attached to the front side of a filter medium bent in an accordion shape, and further, a comb-shaped projection provided on the filter medium contact surface of the filter medium retainer is formed as a fold of the filter medium. By inserting the filter between the folds, it is possible to prevent the filter medium from being deformed by the fluid pressure during use of the filter device, and to prevent the filtration efficiency from decreasing due to the close contact between the folds and the folds.
In addition, when the filter medium retainer is manufactured by assembling a plurality of frame materials, an appropriate number can be assembled and used according to the number of accordion-like irregularities of the filter medium, thereby facilitating the manufacture of the apparatus. Cost can also be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a filter device according to an embodiment of the present invention.

FIG. 2 is a schematic diagram showing an arrangement state of a filter medium.

FIG. 3A is a top view of a filter medium retainer.

FIG. 3B is an exploded view of a filter medium retainer.

[Explanation of symbols]

Reference Signs List A Filter device 1 Filter frame 2 Filter medium 3 Filter medium retainer 4 Back frame 5 Top plate 5a Front projection 6 Bottom plate 6a Front projection 7 Front frame 8 Side frame 9 Side frame 10 Intermediate frame 11 Triangle Support 12 rod support 13 comb-shaped protrusions 14a, 14b, 14c, 14d, 14e, 14f
Connecting projection

Claims (1)

(57) [Scope of request for utility model registration] 1. A filter frame having both left and right sides open, a filter material disposed in the filter frame and pleated in a wave shape, further bent in an accordion shape, and a fluid outflow side exposure of the filter material. A frame-shaped filter medium retainer disposed along the surface and in contact with the filter medium, wherein the filter medium retainer includes a triangular support portion inserted into an accordion-shaped bent concave portion of the filter medium, and left and right sides of the filter frame. A side support portion that comes into contact with the filter medium on the surface side, and at least a filter support surface of the side support portion among the support portions,
A filter device having a plurality of comb-like projections inserted between folds of a filter medium.